کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7823915 1502858 2018 40 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, photodegradable and antibacterial properties of polystyrene-cinnamaldehyde copolymer film
ترجمه فارسی عنوان
سنتز، خواص فتوساز و ضد باکتری فیلم پلی استایرن-سینماالدئید کوپلیمر
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Copolymerization of styrene (St) and different ratios of Cinnamaldehyde (Cin) from cinnamon oil and synthetic cinnamaldehyde were carried out by free radical polymerization, and were characterized by Fourier Transform Infrared (FTIR) spectroscopy, Thermo Gravimetric Analysis (TGA), Differential Scanning Calorimetric (DSC) analysis, and Gel Permeation Chromatography (GPC). Photodegradation of cinnamaldehyde incorporated copolymer (Poly (St-co-Cin)) films have been studied at outdoor weathering and under direct ultraviolet (UV) radiation. The extent of photodegradation was assessed by FTIR spectroscopy, percentage weight loss, surface analysis, average molecular weights and polydispersity indices. FTIR analysis confirms the photodegradable mechanisms of the copolymer films as Norrish Type I, Norrish Type II and photo-oxidation. Extreme weight loss was observed at outdoor weathering with 36.76% weight loss for 75% (w/w) cinnamaldehyde (natural-from cinnamon oil) incorporated copolymer (Poly(St-co-N-Cin)), and 45.58% weight loss for 75% (w/w) cinnamaldehyde (synthetic) incorporated copolymer (Poly(St-co-S-Cin)) with respect to 2.5% weight loss for polystyrene (PS) homopolymer for the period of 100 days. The average molecular weights of Poly(St-co-Cin) copolymers after outdoor weathering have drastically reduced compared to polystyrene. Scanning Electron Microscope (SEM) images clearly depict the fracture generation on Poly(St-co-Cin) films upon degradation. Embrittlement and color developments of the copolymer films with aging were noticeably evident. Furthermore, copolymers were tested positive for antibacterial activity against both gram negative and gram positive bacteria.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 155, September 2018, Pages 195-207
نویسندگان
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